It is far more likely for children to die of the annual flu than from Covid 19.
Not one child should die from side effects when their risks of dying of Covid are less than the vaccine.
Not one child should die because some irresponsible and reckless adult is careless.
Your altruistic reasons do not justify that one child should die from the side-effects of this vaccine.
Responsible adults do not put children in mortal danger, especially with a vaccine that is in an experimental stage. There is a reason why the FDA has not approved the vaccine.